Sound-box for talking-machines.



PATENTED JU E- 2 .1903;

E. D. GLEASON. SOUND BOX FOR TALKING MACHINES.

APPLICATION FILED JULY 30, 1902.

no MODEL.

ma "cams PETKRS to. mmnxulnav WASHINGTON. n c.

No. 730,1 1o. 7

UNITE STATES Patented June 2, 1903.

PATENT OFFICE.

EDWARD D. GLEASON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ELLSWORTH A. HAWTHORNE AND HORACE SHEISLE, OF PHILADELPHIA,

PENNSYLVANIA.

.SOUND-BOX FOR TALKING-MACHINES.

SPEGIFIGATIONforming part of Letters Patent No. 730,110, dated June 2,1903.

Application filed July so. 1902.

To aZZ whom it may concern:

Be it known that IjEDWARD D. GLnAsoN,

a citizen of the United 'States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Sound Boxes for Talking-Machines, of which the following is a specification.

The objects of my invention are to provide a simple and inexpensive form of elastic mounting for the stylus-arm of a sound-box, to amplify the sound by the employment of a plurality of diaphragms instead of the single diaphragm ordinarily used, and to provide a more compact sound-box structure than those heretofore made. These objects I attain in the manner hereinafter set forth, reference being bad to the accompanying drawings, in whieh- Figure l is a sectional view of a single-diaphragm sound-box constructed in accordance with my invention. Fig. 2 is a similar'view illustrating a differentlocation of stylus-lever constituting one of the features of the inven tion. Figs. 3 and 4 are sections of doublediaphragm sound-boxes constructed in accordance with the invention, and Figs. 5, 6, 7, and 8 are front views of the sound-boxes shown in Figs. 1, 2, 3, and 4, respectively.

The sound-box consists of a tubular stem taining the diaphragm 3, which maybe mount ed in the casing of the sound'box in any suitable manner, the diaphragm in the present instance being seated upon an internal annular shoulder formed in the enlarged portion 2 of the sound-box and being retained in position thereon by means of an elastic ring 4:, insertedinto an annular groove in the inner face of said portion 2 of thebox.

Suitably secured to the outeNa-ce ofthe soundfbox shown in Fig. 1 is ashort tube 5, the topof which is closed bya thin diaphragm 6, whichmay be an integral part of the tube 5 or may be a separate piece brazed or otherwise suitably secured to said tube. Projecting outwardly from the center of this diaphragm 6 is a post 7, which carries the styluslever 8 of the instrument, the latter being curved downwardly at the inner end, so as 1, with enlarged or, cup-shaped end 2, con-' Serial No. 117,703. (No model.)

v to bear upon the central portion of the diaphragm 3, to which, if desired, may be suitably secured, the outer end of the stylus-lever having detachably secured therein the stylus 9,'which*engages with the walls of the waved or undulating groove of the record and is vibrated thereby, this vibration being trans.- mitted through the stylus-lever to the diaphragm 3 in order to cause the vibrations of the latter, whereby the sound-waves are reproduced.

The thin diaphragm 6 provides a mounting for the stylus-lever, which is sufliciently elastic or resilient to permit ready vibration of the same, but which'eliminates all loose joints or points of contact between the stylus-lever and sound-box casing, said stylus-lever and its mount in my improved sound-box being substantially one part, so that any chatter or vibration dueto loosely-fitting joints or points of bearing between the stylus-lever and casing is effectually prevented. Y

a In that form of sound-box shown'in Fig. 2 the tube 5 and its diaphragm 6 are disposedupon the sound-box, casing in a manner different from that represented in Fig. 1, and the stylus in this case passes through a central opening in the diaphragm,- to which the stylus-lever may be secured by brazing, soldering, or by other means, one of such other means being the'reduction in the size of the stylus-lever, so as to form ashoulder bearing against the outer face of the diaphragm, the reduced portion of the lever being threaded for the reception of a nut 10, which bears upon the inner face of the diaphragm and serves to securely confine the stylus-lever thereto. 7 In this form of my improved soundbox, moreover, the stylus-lever is located on In order to amplify the sound, I prefer in some cases to use a sound-box having a'double diaphragm, and in Figs. 3 and 4: I have shown two different forms of such a soundbox, that shown in Fig. 3 having outside stylus-levers and that shown in Fig. 4 having an inside stylus-lever.

In the structure shown in Fig. 3 the mounting of the stylus-lever Sis substantially similar to that shown in Fig. 1; but the diaphragm 6 is perforated and the post 7 is continued through the same and through the tube 5 in the form of a supplementary stylus-lever 8, which bears upon the diaphragm 3, the latter being opposed to the diaphragm 3, upon which the stylus-lever 8 bears, and the tubular stem 1 of the sound-box projects laterally from the casing 2, so as to communicate with the chamber between the two diaphragms.

In the double-diaphragm box (shown in Fig. 4) the stylus-lever is mounted in the same manner as in Fig. 2, but it has a T-shaped inner end, one arm of the T bearing against the diaphragm 3 and the other against the diaphragm 3. In this sound-box, also, an elbow-tube 1 replaces the straight tubes of the sound-boxes previously described, the object being to provide a horn attaching portion projecting at right angles to the diaphragm, while at the same time retaining the lateral communication with the sound-chamber necessitated by the use of the two diaphragms.

Having thus described my invention, I claim and desire to secure by Letters Patent-- 1. A sound-box for talking-machines in which are combined a casing, a diaphragm mounted therein, a tube projecting from said casing, and also carrying a diaphragm, and

a stylus-lever mounted upon the latter diaphragm, substantially as specified.

A talking-machine sound-box having a casing containinga diaphragm, a stylus-lever bearing upon the inner face of said diaphragm, and projecting laterally through the casing, and a tube surrounding said styluslever and carrying a diaphragm upon which the same is mounted, substantially as specified.

3. A talking-machine sound-box having a plurality of diaphragms, a duplex stylus-lever having a stylus-lever and a bearing upon each of said diaphragms, a tube projecting from said sound-box, and a diaphragm closing the end of said tube and providing an elastic support for the stylus-lever, substantially as specified.

4. A talkingmachine sound-box having a plurality of diaphragms, a duplex stylus-lever having asingle stylus and a bearing upon the inner face of each of said diaphragms, a

tube projecting from the sound-box and surrounding the stylus-lever, and a diaphragm closing the end of said tube and providing an elastic mounting for said stylus-lever, substantially as specified.

5. A talking-machine sound-box having a plurality of diaphragms each exposed upon its outer face, a tubular stem projecting laterally from the sound-box and communicating with the chamber between the two dia+ phragms, and a duplex stylus-lever having a single stylus and a positive connection with each of said diaphragms, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD D. GLEASON.

Witnesses:

F. E. BECI-ITOLD, Jos. I-I. KLEIN. 

